[Cruisin428]

Pull the eec relay (also, disconect the coil wire from the coil), check for 12v coming to the relay, jumper a wire across and check 12v past it at the eec (might want to disconect the eec. Having a loose ground , loose 12v, corrosion in a wire or at a plug or a relay that has burnt contacts could give you a low voltage

Also, With the power OFF, use your OHMs setting on the meter and check continuity of the wire itself from one end to other. Set it to the diode setting if you have it, and the meter will give you a strong beep?? Sound if you have continuity. You may have to disconect the wires from where they go! As in pulling the eec or its relay, disconect the coil wire from the coil etc. this will also check the fuse links (just noticed you stated 0 v at the eec and coil and i am not looking at a wiring diagram at the moment, so parts of the above it seems you already know!)
You could jumper 12v to the eec relay and see if you have 12 v at the coil then you know its a wire under the dash and not engine compartment for the coil!